python基础(二)-实战购物车

#!/usr/bin/env python
import types
#购物车
# 需求:
# 1.启动程序后，让用户输入工资，然后打印商品列表
# 2.允许用户根据商品编号购买商品
# 3.用户选择商品后，检测余额是否足够，够就直接扣款，不够就提醒
# 4.可随时退出，退出时，打印已购买商品和余额


goods = [
    ['iphone7',6500],
    ['macbook',12000],
    ['pythonbook',66],
    ['bike',999]
]

input_str = ''
buy_list = []

while True:
    salary = input("salary >: ")
    if salary.isdigit():
        salary = float(salary)
        break
    else:
        print('plesae input num')
        continue

print('------production list-------')
for goods_index,goods_info in enumerate(goods):
    print(goods_index,goods_info[0],goods_info[1])

while True:

    choice = input(">>: ")

    if choice.isdigit():

        choice = int(choice)

        if choice < len(goods) and choice > 0:

            print('------production list-------')
            for goods_index, goods_info in enumerate(goods):
                print(goods_index, goods_info[0], goods_info[1])

            product_item = goods[choice]
            if product_item[1] > salary:
                print('cannot afford this product, need', product_item[1] - salary)
            else:
                salary -= product_item[1]
                buy_list.append([product_item[0],product_item[1]])
                print("added %s into your cart,your current balance is %s" % (product_item[0], salary))

        else:
            print('没有此商品,请重新输入')

    elif choice == 'exit':
        total_cost = 0
        for product_info in buy_list:
            total_cost += product_info[1]
        print(salary,total_cost)
        break

    else:
        print('输入错误，重新输入')
        continue